Plate tectonics Crossword

An under sea mountain range where new ocean floor is produced.
When plates slide against each other.
The theory that the Earth's plates are constantly in motion.
When plates collide with each other.
A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.
A section of the lithosphere that slowly moves over the astheneosphere, carrying pieces of oceanic and continental crust.
Where pieces of Earth's crust diverge on land, a deep valley called a ________ forms.
Any trace of an ancient organism that has been preserved in rock.
When plates move apart from each other.
Process where molten material adds new oceanic crust to the ocean floor.
A supercontinent that existed about 300 million years ago.
Wegener's hypothesis that all continents were once one landmass and have since drifted.
Process by which ocean floor sinks beneath a deep ocean trench.
Breaks on earth's crust where rocks have slipped past each other.